diff --git a/include/drivers/arm/smmu_v3.h b/include/drivers/arm/smmu_v3.h
index b7efde4..e3912e3 100644
--- a/include/drivers/arm/smmu_v3.h
+++ b/include/drivers/arm/smmu_v3.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,18 +7,19 @@
 #ifndef __SMMU_V3_H__
 #define __SMMU_V3_H__
 
+#include <utils_def.h>
 #include <stdint.h>
 
 /* SMMUv3 register offsets from device base */
-#define SMMU_S_IDR1	0x8004
-#define SMMU_S_INIT	0x803c
+#define SMMU_S_IDR1	U(0x8004)
+#define SMMU_S_INIT	U(0x803c)
 
 /* SMMU_S_IDR1 register fields */
 #define SMMU_S_IDR1_SECURE_IMPL_SHIFT	31
-#define SMMU_S_IDR1_SECURE_IMPL_MASK	0x1
+#define SMMU_S_IDR1_SECURE_IMPL_MASK	U(0x1)
 
 /* SMMU_S_INIT register fields */
-#define SMMU_S_INIT_INV_ALL_MASK	0x1
+#define SMMU_S_INIT_INV_ALL_MASK	U(0x1)
 
 
 int smmuv3_init(uintptr_t smmu_base);